189917434 has 12 divisors (see below), whose sum is σ = 331386714. Its totient is φ = 81393144.

The previous prime is 189917423. The next prime is 189917467. The reversal of 189917434 is 434719981.

It can be written as a sum of positive squares in only one way, i.e., 189200025 + 717409 = 13755^2 + 847^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 968869 + ... + 969064.

Almost surely, 2^189917434 is an apocalyptic number.

189917434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

189917434 is a deficient number, since it is larger than the sum of its proper divisors (141469280).

189917434 is a wasteful number, since it uses less digits than its factorization.

189917434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937949 (or 1937942 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 189917434 is about 13781.0534430427. The cubic root of 189917434 is about 574.8064215420.

The spelling of 189917434 in words is "one hundred eighty-nine million, nine hundred seventeen thousand, four hundred thirty-four".